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SurfControl Web Filter v5.5 Administrator’s Guide 103
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Subnets Tab
9
6 Repeat steps 1 to 5 for other subnets you do not want to monitor.
7 Select Do not Monitor traffic to or from these subnets.
By configuring subnets on multiple Web Filter servers, you ensure the subnets are only monitored on one
server in your network environment. You need to specifically identify subnets you do not want to monitor
on one Web Filter server, and define one or more subnets you do want to monitor on each subsequent
Web Filter server. This allows you to divide the volume load of network traffic across your servers, making
them more efficient. To configure your subnets on multiple Web Filter servers:
1 Identify the subnets you do not want to monitor.
2 On the first Web Filter server, click the Subnet tab, and click Add.
3 Enter the ip address of the subnet in the IP Address text box.
4 Enter the subnet mask in the Mask text box.
5 Click OK.
6 Repeat steps 1 to 5 for other subnets you do not want to monitor.
7 Select Do not Monitor traffic to or from these subnets.
8 For each subsequent Web Filter server, you should identify a specific subnet that you do want to
monitor. To do this, identify subnets you do want to monitor, and follow steps 2 to 5.
9 Select Only Monitor traffic to or from these subnets.
Ignore Subnets
During installation, Web Filter detects the internal subnets on your monitoring and blocking network card.
The Web Filter server ignores inbound traffic to these internal subnets, reducing the load on the Web Filter
Service.
The subnets detected are listed in the Ignore Subnets section of the Subnets tab. You also have the
following options:
• Add a new subnet.
• Remove a subnet.
• Edit the IP address or subnet mask for an existing subnet.